"This is how mindfulness of in-&-out breathing is developed & pursued so as to be of great fruit, of great benefit. The Four Frames of Reference "Now how is mindfulness of in-&-out breathing developed & pursued so as to bring the four frames of reference to their culmination? "[1] ...
then at some point you may want to study the Buddha’s own personal instruction on the subject-the Anapanasati Sutta.It outlines the very steps of breath meditation the Buddha himself used to gain Enlightenment.